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NaOH was dissolved in MgCl2, the color turned dark pink (from white). Then HCl was added and the color changed back to white.
Now I have question:
The reaction you observed was Mg(OH)2 (s) <=> Mg(aq) ^+ 2 OH^- (aq).Compare the colors you observed in the experiment and answer these questions:
A. Which way should the equilibrium shift when HCl is added? How do your results support your answer?B. Which way should the equilibrium shift when Na2EDTA is added? How do your results support your answer?C. Is this reaction endothermic or exothermic? How do you know?
Each of 2 front tire in the car is filled with a different gas. One tire contains 116g of helium, another tire has 160g of unknown gas. How many times heavier is a molecule of the unkown gas than an atom of helium.
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Europium crystallizes in a body-centered cubic lattice (the Eu atoms occupy only the lattice points).The density of Eu is 5.26 g/cm3. Calculate the unit cell edge length in pm.
assume you dissolve .297 g of the weak acid benzoic acid in enough water to make 105 mL of solution and then titrate the solution with .141 M NaOH. What are the concentrations of Na+ at the equivalence point?
Calculate the heat of reaction for the same reaction where water is a gaseous product instead of a liquid.
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What happens if student forgets to rinse the buret with a small portion of EDTA solution. (Buret contains water droplets from washing.) If this incorrect concentration of EDTAis used to calculate the ppm CaCO3
What is the [H30+] and the pH of a benzioc acid-benzoate buffer that consists of 0.17 M C6H5COOH and 0.26 M C6H5COONa? (Ka of benzoic acid = 6.3*10^-5)
Describe the bonding in SeO2 in valence bond terms. Note whether or not there is delocalized bonding and explain how molecular orbital theory can be useful here.
How many J of heat are necessary to raise the temperature of a 1.05-kg block of iron from 25.0 C to 88.5 C?
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